E.E.N.T. in P.C.O.O.S. Country.
D002140:California; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D007198:Indians, North American; D009885:Ophthalmology / Q000266:history*; D009922:Oregon; D010036:Otolaryngology / Q000266:history*; D014861:Washington